Books by Edmund Lester Pearson:
Books in the extended shelves:
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Pearson, Edmund Lester: The depth of sewage filters and the degree of purification (Urbana, Ill., 1928), also by Arthur Moses Buswell, G. E. Symons, Sidney Lionel Neave, Herbert LeRoy White, George Conrad Habermeyer, and Sherman Israel Strickhouser (page images at HathiTrust)
Find more by Edmund Lester Pearson at your library, or elsewhere.